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Finding the Fourth Proportional to 399,078.64, 598,603.38 and 118,588.60

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Solution

The fourth proportional to 399,078.64, 598,603.38 and 118,588.60 is: 177,878.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,078.64 : 598,603.38 = 118,588.60 : x
  2. Step 2: Convert to fraction form
    399,078.64/598,603.38 = 118,588.60/x
  3. Step 3: Cross multiply
    399,078.64x = 598,603.38 × 118,588.60
  4. Step 4: Simplify right side
    399,078.64x = 70,987,536,789.47
  5. Step 5: Solve for x
    x = 70,987,536,789.47/399,078.64
  6. Step 6: Final answer
    x = 177,878.57

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.